Earlier quoted context omitted.
He demonstrably has a working compiler and programming language. Calling it a "fantasy" just because he has not given you full access to the source is plain incorrect. He streams so much of his development work on the compiler that a determined party could probably reproduce it by just copying the text from his text editor. He streams so much of his game development using the compiler that it obviously and unambiguou…
I can make a python script that prints out stuff while I'm streaming, too. He hasn't demonstrated squat. But, let's say he does have a working compiler. It's very probable that he does. Why doesn't he release it, then? Well you see, the only way it's possible to really effectively criticize a programming language is to use it. By not releasing the compiler, he avoids real criticism. So, no, I don't take him seriously…
I really doubt this. The amount of effort and acting that would need to go into being able to script in advance the sort of mistakes you make when programming would be astronomic. You would have to never make a typo when you weren't supposed to, always make a typo when you are, somehow deal with the fact that when you get stuck you need to be able to respond to audience feedback, and so on and so forth. (Oh, and interactive 3d programs not just text to a terminal).
That's a lot harder than making a programming language.
> Why doesn't he release it, then?
Because he doesn't think public feedback would be helpful at this time. Because he wants to release software that he can take pride in instead of a alpha level programming language. Because that's what he is used to from game development. Because he feels like it. Etc. Why does it matter? You aren't entitled to it.